When joining two pieces of wood perpendicularly using only glue, it forms what is known as a butt joint. However, it is considered a weak joint due to the absence of any reinforcement. A butt joint is formed by placing the long grain of one piece against the end grain of another. Nails or screws are not commonly used with this joint as the wood may split or crack. If fasteners are necessary, woodworkers will often pre-drill holes to prevent damage to the wood. Precise square cuts are crucial in creating a flush fit between the two pieces. Because of its weak nature, butt joints are typically used in stationary projects that do not require bearing significant weight or frequent movement.